I have been asked by the moderator to not discuss this subject without proof, so here is proof that Walmart SuperTech Full Synthetic Oils are made by Shell (owners or Quaker State/Pennzoil). Of course, this is not proof of whether it is identical to PP as some have claimed, but I am not making that claim here.
After checking the Walmart MSDS website, it appears that all grades of SUPER TECH Full Synthetic Motor Oil are now made by Specialty Oil Company, P.O. Box 4427, Houston, TX. 77210-4427. Warren apparently still distributes (or even may blend) the regular and synthetic blend Super Tech oil, but not the full synthetics.http://msds.walmartstores.com/cache/347432.pdf
Some posters on the following link suggested that Specialty Oil Company is owned by Shell (Pennzoil/Quaker State). http://www.buggiesgonewild.com/gas-ezgo/12266-full-synthetic.html
I called the Specialty Oil Company MSDS Assistance Number: (877) 276-7285 listed on the MSDS link above from the Walmart site for SuperTech Synthetic oil:
a. First I hit 1 for English
b. then I hit 3 for technical information regarding the MSDS
c. Then the voice response unit asks whether you want technical information for Shell, Pennzoil/Quaker State, or other car care products.
Then I went to the Pennzoil webpage to get the phone number for their MSDS info.http://www.pennzoil.com/site/contact.html
The phone number is different (800-546-6227) than the one above, but when you call that number for Pennzoil MSDS you get the exact same voice response information as for Specialty Oil Company (and all other Shell companies).